Gas hydrate related bottom-simulating reflections along the West-Svalbard Margin, Fram Strait

Andreia Plaza-Faverola; Sunil Vadakkepuliyambatta; Sunny Singhroha; Wei-Li Hong; Kate A. Waghorn; Amando P.E. Lasabuda; Benedicte Ferré; Stefan Bünz; Jürgen Mienert

doi:10.1007/978-3-030-81186-0_18

Gas hydrate related bottom-simulating reflections along the West-Svalbard Margin, Fram Strait

Andreia Plaza-Faverola, Sunil Vadakkepuliyambatta, Sunny Singhroha, Wei-Li Hong, Kate A. Waghorn, Amando P.E. Lasabuda, Benedicte Ferré, Stefan Bünz, Jürgen Mienert

Publikation: Bidrag til bog/rapport/konferenceproceedings › Bogkapitel › Forskning › peer review

1 Citationer (Scopus)

Resumé

Gas hydrate systems along the west-Svalbard margin exist in a unique polar margin setting characterized by: (1) changes in sub-seabed pressure due to glacial isostatic rebound and flexure since the onset of glaciations at 2.7 Ma; (2) rapid fluctuations in sediment delivery towards the continental slope associated with glacial dynamics; (3) bottom current variations in both temperature and position along the slope; and (4) geothermal gradient variations (80-160 °C/km) and near-surface deformation associated with ultra-slow mid-ocean ridge spreading. Along this polar margin, the base of the gas hydrate stability zone and thus the depth of the bottom simulating reflection (BSR) adapts to these changes in both pressure and temperature. However, it is the presence of a focused fluid flow system sustained by microbial, thermogenic and possibly even abiotic gas sources reaching the near-surface that determines the distribution of BSRs across the margin. Thus, gas hydrate stability, and therefore BSR dynamics in this polar margin, respond to a mixture of complex mechanisms affecting the system from the top and from the bottom. In this article we describe the structural, sedimentary and oceanographic setting, the type of gas hydrate-related BSRs and the different geological footprints (e.g., gas chimneys, pockmarks, brecciated pathways, mounds) associated with the migration of shallow gas through the gas hydrate stability zone over geological time along the west-Svalbard margin.

Originalsprog	Engelsk
Titel	World atlas of submarine gas hydrates in continental margins
Redaktører	Jürgen Mienert, Christian Berndt, Anne M. Tréhu, Angelo Camerlenghi, Char-Shine Liu
Forlag	Springer
Sider	225-235
Antal sider	11
ISBN (Elektronisk)	978-3-030-81186-0
ISBN (Trykt)	978-3-030-81185-3
DOI	https://doi.org/10.1007/978-3-030-81186-0_18
Status	Udgivet - 1 jan. 2022
Udgivet eksternt	Ja

Programområde

Programområde 5: Natur og klima
Programområde 3: Energiressourcer

Adgang til dokumentet

10.1007/978-3-030-81186-0_18

Citationsformater

Plaza-Faverola, A., Vadakkepuliyambatta, S., Singhroha, S., Hong, W.-L., Waghorn, K. A., Lasabuda, A. P. E., Ferré, B., Bünz, S., & Mienert, J. (2022). Gas hydrate related bottom-simulating reflections along the West-Svalbard Margin, Fram Strait. I J. Mienert, C. Berndt, A. M. Tréhu, A. Camerlenghi, & C.-S. Liu (red.), World atlas of submarine gas hydrates in continental margins (s. 225-235). Springer. https://doi.org/10.1007/978-3-030-81186-0_18

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title = "Gas hydrate related bottom-simulating reflections along the West-Svalbard Margin, Fram Strait",

abstract = "Gas hydrate systems along the west-Svalbard margin exist in a unique polar margin setting characterized by: (1) changes in sub-seabed pressure due to glacial isostatic rebound and flexure since the onset of glaciations at 2.7 Ma; (2) rapid fluctuations in sediment delivery towards the continental slope associated with glacial dynamics; (3) bottom current variations in both temperature and position along the slope; and (4) geothermal gradient variations (80-160 °C/km) and near-surface deformation associated with ultra-slow mid-ocean ridge spreading. Along this polar margin, the base of the gas hydrate stability zone and thus the depth of the bottom simulating reflection (BSR) adapts to these changes in both pressure and temperature. However, it is the presence of a focused fluid flow system sustained by microbial, thermogenic and possibly even abiotic gas sources reaching the near-surface that determines the distribution of BSRs across the margin. Thus, gas hydrate stability, and therefore BSR dynamics in this polar margin, respond to a mixture of complex mechanisms affecting the system from the top and from the bottom. In this article we describe the structural, sedimentary and oceanographic setting, the type of gas hydrate-related BSRs and the different geological footprints (e.g., gas chimneys, pockmarks, brecciated pathways, mounds) associated with the migration of shallow gas through the gas hydrate stability zone over geological time along the west-Svalbard margin.",

author = "Andreia Plaza-Faverola and Sunil Vadakkepuliyambatta and Sunny Singhroha and Wei-Li Hong and Waghorn, {Kate A.} and Lasabuda, {Amando P.E.} and Benedicte Ferr{\'e} and Stefan B{\"u}nz and J{\"u}rgen Mienert",

note = "Publisher Copyright: {\textcopyright} Springer Nature Switzerland AG 2022, corrected publication 2022.",

year = "2022",

month = jan,

day = "1",

doi = "10.1007/978-3-030-81186-0_18",

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Plaza-Faverola, A, Vadakkepuliyambatta, S, Singhroha, S, Hong, W-L, Waghorn, KA, Lasabuda, APE, Ferré, B, Bünz, S & Mienert, J 2022, Gas hydrate related bottom-simulating reflections along the West-Svalbard Margin, Fram Strait. i J Mienert, C Berndt, AM Tréhu, A Camerlenghi & C-S Liu (red), World atlas of submarine gas hydrates in continental margins. Springer, s. 225-235. https://doi.org/10.1007/978-3-030-81186-0_18

Gas hydrate related bottom-simulating reflections along the West-Svalbard Margin, Fram Strait. / Plaza-Faverola, Andreia; Vadakkepuliyambatta, Sunil; Singhroha, Sunny et al.
World atlas of submarine gas hydrates in continental margins. red. / Jürgen Mienert; Christian Berndt; Anne M. Tréhu; Angelo Camerlenghi; Char-Shine Liu. Springer, 2022. s. 225-235.

Publikation: Bidrag til bog/rapport/konferenceproceedings › Bogkapitel › Forskning › peer review

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T1 - Gas hydrate related bottom-simulating reflections along the West-Svalbard Margin, Fram Strait

AU - Plaza-Faverola, Andreia

AU - Vadakkepuliyambatta, Sunil

AU - Singhroha, Sunny

AU - Hong, Wei-Li

AU - Waghorn, Kate A.

AU - Lasabuda, Amando P.E.

AU - Ferré, Benedicte

AU - Bünz, Stefan

AU - Mienert, Jürgen

PY - 2022/1/1

Y1 - 2022/1/1

N2 - Gas hydrate systems along the west-Svalbard margin exist in a unique polar margin setting characterized by: (1) changes in sub-seabed pressure due to glacial isostatic rebound and flexure since the onset of glaciations at 2.7 Ma; (2) rapid fluctuations in sediment delivery towards the continental slope associated with glacial dynamics; (3) bottom current variations in both temperature and position along the slope; and (4) geothermal gradient variations (80-160 °C/km) and near-surface deformation associated with ultra-slow mid-ocean ridge spreading. Along this polar margin, the base of the gas hydrate stability zone and thus the depth of the bottom simulating reflection (BSR) adapts to these changes in both pressure and temperature. However, it is the presence of a focused fluid flow system sustained by microbial, thermogenic and possibly even abiotic gas sources reaching the near-surface that determines the distribution of BSRs across the margin. Thus, gas hydrate stability, and therefore BSR dynamics in this polar margin, respond to a mixture of complex mechanisms affecting the system from the top and from the bottom. In this article we describe the structural, sedimentary and oceanographic setting, the type of gas hydrate-related BSRs and the different geological footprints (e.g., gas chimneys, pockmarks, brecciated pathways, mounds) associated with the migration of shallow gas through the gas hydrate stability zone over geological time along the west-Svalbard margin.

AB - Gas hydrate systems along the west-Svalbard margin exist in a unique polar margin setting characterized by: (1) changes in sub-seabed pressure due to glacial isostatic rebound and flexure since the onset of glaciations at 2.7 Ma; (2) rapid fluctuations in sediment delivery towards the continental slope associated with glacial dynamics; (3) bottom current variations in both temperature and position along the slope; and (4) geothermal gradient variations (80-160 °C/km) and near-surface deformation associated with ultra-slow mid-ocean ridge spreading. Along this polar margin, the base of the gas hydrate stability zone and thus the depth of the bottom simulating reflection (BSR) adapts to these changes in both pressure and temperature. However, it is the presence of a focused fluid flow system sustained by microbial, thermogenic and possibly even abiotic gas sources reaching the near-surface that determines the distribution of BSRs across the margin. Thus, gas hydrate stability, and therefore BSR dynamics in this polar margin, respond to a mixture of complex mechanisms affecting the system from the top and from the bottom. In this article we describe the structural, sedimentary and oceanographic setting, the type of gas hydrate-related BSRs and the different geological footprints (e.g., gas chimneys, pockmarks, brecciated pathways, mounds) associated with the migration of shallow gas through the gas hydrate stability zone over geological time along the west-Svalbard margin.

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Plaza-Faverola A, Vadakkepuliyambatta S, Singhroha S, Hong WL, Waghorn KA, Lasabuda APE et al. Gas hydrate related bottom-simulating reflections along the West-Svalbard Margin, Fram Strait. I Mienert J, Berndt C, Tréhu AM, Camerlenghi A, Liu CS, red., World atlas of submarine gas hydrates in continental margins. Springer. 2022. s. 225-235 doi: 10.1007/978-3-030-81186-0_18

Gas hydrate related bottom-simulating reflections along the West-Svalbard Margin, Fram Strait

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